if you fly to amman and then travel by car or taxi to israel, you can just get the visa at the border. they will make you wait there a lot longer if you look like someone from non-Western countries (if you are not blonde) and if you are young and if you have a beard. Older women pass through within half an hour (very fast) and young men who have darker hair/skin color they can get a visa after 4-5 hours of waiting. Even if you have blonde hair, make sure you have no beard if you do not want to wait there too long. Also if your passport shows you have traveled to other countries like Syria, Iran, etc, then you will end up waiting there for a very long time. Plus you will be interrogated by armed teenage soldiers at the border, which can be quite unpleasant.